What are the disadvantages of Open Source Software?

While the users of the Open Source software get countless benefits, Open Source software ironically harms software industry and it self. Since many of open source software relies on donation rather than selling the software for cost, they may not always generate the operating cost. Also by providing free alternative source of software it’s harming the interchangeable proprietary software. According to research done by Standish Group, open source software is costing proprietary software industry by about $60 billion per year which is about 6% of worlds software market (Rothwell, 2008).  This is most likely to increase in future considering the rate of growth mentioned in Wheeler’s paper (Wheeler, 2007).